Texas Instruments TPS2HCS08-Q1 Dual Channel Smart High-Side Switch
Texas Instruments TPS2HCS08-Q1 Dual Channel Smart High-Side Switch is controlled through a serial peripheral interface (SPI) and is intended for power distribution and actuator drive applications. The device integrates robust protection to ensure output load and wire protection against short circuit or overload conditions. The device features overcurrent protection that is configurable via SPI with sufficient flexibility to support loads that require large inrush currents and provide improved protection. The device also integrates a programmable fuse profile (current versus time) that turns off the switch under persistent overload conditions. Together, the two features allow the optimization of the wire harness for any load profile with full protection.
The device supports a SPI-configurable capacitive charging mode for ECU loads in power distribution switch applications. The device also includes two low power mode (LPM) states, an auto entry mode or a manual entry mode, that enables the device to provide current to the load ECU while only consuming about 10µA to 20µA of current.
The Texas Instruments TPS2HCS08-Q1 also provides a high-accuracy digital current sense over SPI, allowing for improved load diagnostics. By reporting load current, the channel output voltage, and the output FET temperature to a system MCU, the device enables diagnosis of load and switch failures. The TPS2HCS08-Q1 is available in an HTSSOP package, which allows for reduced PCB footprint.
Features
- AEC-Q100 qualified for automotive applications
- Temperature grade 1 of –40°C to 125°C
- Device HBM ESD classification level 2
- Device CDM ESD classification level C5
- Withstands 36V load dump
- Dual-channel SPI-controlled smart high-side switch with integrated nFETs.
- Integrated wire-harness protection without MCU involvement and an SPI programmable fuse curve with protection against persistent overload conditions
- Improve system-level reliability through SPI programmable adjustable overcurrent protection
- SPI configurable capacitive charging mode to drive a wide range of capacitive input ECUs load current needs
- Low quiescent current, low power ON-state to supply always-ON loads with an automatic wake on load current increase, with a wake signal to the MCU
- Robust integrated output protection
- Integrated thermal protection
- Protection against short-to-ground
- Protection against reverse battery events, including automatic switch-on of the FET with reverse supply voltage
- Automatic shut off on loss of battery and ground
- Integrated output clamp to demagnetize inductive loads
- Digital sense output via SPI can be configured to measure
- Load current accurately with integrated ADC
- Output or supply voltage, FET temperature
- Provides full fault diagnostics through the SPI interface and indication through the FLT pin that provides detection of open load and short-to-battery
Applications
- Automotive zone ECU
- Power distribution modules
- Body control modules
Simplified Schematic
Development Tools
Texas Instruments HSS-HCMOTHERBRDEVM Smart Fuse Evaluation Module
This module showcases and evaluates all TI's smart fuse high-side switch portfolio features.
Texas Instruments HSS-HCS-BLANKEVM Smart Fuse Daughtercard
Daughter card combined with HSS-HCMOTHERBRDEVM shows the functionality of TI's smart fuse portfolio.
Texas Instruments HSS-2HCS08EVM Daughter Card
Evaluates using a motherboard & daughter card, includes a TPS2HCS08-Q1 high-side switch.